Steps to Reproduce:
1. Navigate to Setup > Users/Roles > Manage Roles.
2. Edit custom role.
3. Navigate to Permissions tab > Lists subtab.
Actual Result: Promotion permission is not available.
To resolve this, Sales Force Automation feature should be enabled on the account.
1. Navigate to Setup > Company > Enable Features.
2. Mark Sales Force Automation under CRM tab.
3. Click Save.
Note: Access to Promotion record is controlled by Sales Force Automation list value. Enhancement 149940 is filed to request the ability to add Promotions permission regardless if the feature is enabled or not.